Android实现二维码扫描自定义扫描界面

本来是使用默认扫描的界面，虽然也能识别但界面过于简陋，自己就自定义优化一下，代码如下。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".activity.CamerScan">

    <androidx.appcompat.widget.Toolbar
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textColor="@android:color/white"
        android:textSize="18sp"
        android:background="@color/colorPrimary"
        app:title="扫描链接" />

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">


        <com.journeyapps.barcodescanner.DecoratedBarcodeView
            android:id="@+id/viewfinder_content"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:corner_color="@color/corner_color"
            app:frame_color="@color/viewfinder_frame"
            app:label_text="请扫描网站上的二维码"
            app:label_text_color="@color/colorAccent"
            app:laser_color="@color/laser_color"
            app:mask_color="@color/viewfinder_mask"
            app:result_color="@color/result_view"
            app:result_point_color="@color/result_point_color" />

        <ImageButton
            android:id="@+id/btn_flash"
            android:layout_width="40dip"
            android:layout_height="40dip"
            android:padding="6dip"
            android:layout_gravity="bottom|center_horizontal"
            android:layout_marginBottom="30dip"
            android:background="?attr/selectableItemBackground"
            android:scaleType="centerInside"
            android:visibility="gone"
            android:src="@drawable/flash_off" />

    </FrameLayout>
</LinearLayout>

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package com.ccf.feige.vmqapk.activity;

import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import com.ccf.feige.vmqapk.R;
import com.google.zxing.Result;
import com.google.zxing.ResultPoint;
import com.journeyapps.barcodescanner.BarcodeCallback;
import com.journeyapps.barcodescanner.BarcodeResult;
import com.journeyapps.barcodescanner.DecoratedBarcodeView;

import java.util.List;

public class CamerScan extends AppCompatActivity {
    private static final int CAMERA_PERMISSION_REQUEST_CODE = 101;
    private DecoratedBarcodeView barcodeView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_camer_scan);

        barcodeView = findViewById(R.id.viewfinder_content);

        if (checkCameraPermission()) {
            setupBarcodeScanner();
        } else {
            requestCameraPermission();
        }
    }

    private boolean checkCameraPermission() {
        return ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED;
    }

    private void requestCameraPermission() {
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, CAMERA_PERMISSION_REQUEST_CODE);
    }

    private void setupBarcodeScanner() {
        barcodeView.decodeContinuous(new BarcodeCallback() {
            @Override
            public void barcodeResult(BarcodeResult result) {
                handleResult(result.getResult());
            }

            @Override
            public void possibleResultPoints(List<ResultPoint> resultPoints) {
                // Handle potential result points if needed
            }
        });
    }

    private void handleResult(Result result) {
        Log.d("CamerScan", "QR Code Content: " + result.getText());
        Toast.makeText(this, "QR Code: " + result.getText(), Toast.LENGTH_LONG).show();
        // Additional handling of QR code content
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == CAMERA_PERMISSION_REQUEST_CODE) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                setupBarcodeScanner();
            } else {
                Toast.makeText(this, "Camera permission is required to scan QR codes", Toast.LENGTH_LONG).show();
            }
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (checkCameraPermission()) {
            barcodeView.resume();
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        barcodeView.pause();
    }
}

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如何调用

      Intent intent=new Intent(MainActivity.this, CamerScan.class);
                startActivity(intent);
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